21 and 22 questions

which feature could be found in a vein but NOT an artery

a one way valve

Shortages of iron in our diet can cause animea, its characterise by

a reduction in the bloods capacity to transport oxygen

the structures that carry signals away from the cell body of a neuron are called

axons

You are mad because driving, your ____ helped you remain calm

limbic system

Thing happens during inhalation

oxygen rich blood enters the alveoli

in systic fibrosis, parts of the respirtory tract can be clogged with mucus, where are gasses exchagned directly

Alveoli

the pulmonary___ carries____ blood from the heart to the lungs

Artery -- oxygen-poor

The figure shown indicates an LIl baby pahtway

Axon

A newborn is diagnosed shortly after birth with a rare heart defect that prevented the valve between left atrium and ventricul from forming, what is the outcome

Body cells would recive less oxygen rich blood than normal

The blood vessels that allow diffusion between blood and nearby body cells are

Capillaries

the ___ of a neuron contains all the structures, such as a nucleus, that are comon to animal cells

Cell body

the Thamas is part of the ___ nervous system

Central

Which part of you helps you decide this answer

Cerebral cortex

Antiduretic is produced by the pituitary gland ADH travels from the pituitary gland to the kidneys through the

Circulatory system

The branced structures on a nerve cell that revice info are called

Dendrites

Why do humans rely on circulitory to circulate oxygen

Diffusion is very slow over all but the shortest distances so oxygen must be deliveded to our cells to speed up the process

THe liquid portion of human blood cannot absorb enough oxygen to meet hte bodys demands however ___ in our red blood cells greatly increase the oxygen carrying capacity of human blood

Hemaglobin

Gasses move from an area of ____ to ___

High to low

accuratly describes homrone signlaling

Hormones act on specific target cells

Describe how hormones can effect a cell as illustrated by differnt figures

Hormones are effective in low concentrations

Acuratly describes hormone SIGNALING

Hormones may signal cells that are located far away from them

When the ____ of the heart contracts, blood is pumped into the Systemic circuit

Left ventricle

the sensory repecots that brovide info about body position and balance are

Mechanorreceptors,

Where on a target cell would you expect to find a receptor for seratonin

On the outside of the plasma membrain

another name for Pacemaker is

Sinoatrial SA node

the external signals and information that are recived by an organism are called

Stimuli

which statement about the periprerial nervous system is NOT true

THis is NOT true: the PNS may intergrate and process information

Which of the following organs coordinates communication between endocrin and nervouse

The HYpothalamus

which component of the whole blood would an investigator examine to determine the concentration of dissolved carbon dioxide or hormones such as testosterone

The plasma

Sensory neurons that contain specialized membrane channels activated by moderate tempetures are

Thermoreceptors

True about hormones

They may regulate certain developmental periods of life

which of the following fuctions occurs in the Urinary bladder BUT NOT IN nephrons

Urine storage

blood vessels that are designed to carry blood under high pressure are called ___ blood vessels are thin, porus walls are called ____

artereise, Capilaries

The force of blood pushing against the walls of blood vessels is called

blood pressure

For a human to inhale, the rib muscles and the diapram must

contract, decreasing the pressure in the lungs

which of the following sequences correctly describes the pathway that a signal travels in a neuron

dendrite to cell body axon

which of the folowing processis is NOT a function of nephrons

diffusion of oxygen into body cells

which statement about Hemaglobin is true?

hemaglobin binds to oxygen and releases it near cells that are performing cellular respiration

Once a hormone enters the bloodstream it,

is broken down afterit has perfromed its function on the target cells

the concentraion of oxygen in blood plasma near an Alveolu is lowered when

odygen diffuses into red blood cells that binds to hemoglobin

Which of the follwoing sequences correctly describes the journey of a molecule of oxygen from the pharnx an olveolus

pharynx to TRACH to BRON to BROchlie to av

Receptors in the eye that provide vision are

photoreceptors

Valuable solutes, like sugar and small protiens that enter a nephron are ___ by capilaries

reaborbed

at high altitudes gases are less concentrated, You might gasp for air becasue

the amount of oxygen that could diffuse into your blood will be decreased

People with sickle cell disease have deformed hemolobin, and often have muslce pains this happens because the hemoglob is

un able to carry the amount of oxygen required for normal muscle activities

which of the following is a characteristic of an organ used for gas exchange

very thin tissues

which of the following statements accuratly describes the movement of water and waste within a nephron

water and waste both filter through the glomerulus, water is later reobsorbed from capillaries

When eating desert, you notice the sweetness of sugar when ___ are stimulated

Chemoreceptors

If you were to compare the filtrate that is leaving the Glomerulus to URine that is exiting the body, you would find that some substances such as hydrogen ions and toxis are more concentrated in the Urine, which of the following explains this

Hydrogen Ions and Toxins are secreted from capillaries

Blood flows rapidly within the arterial system but slows dramatically as it enters the capillaries what is the benefit of having blood move slowly through the capillaries

It ensures that the blood has enough time to exchange materials with the surrounding cells

Blood leaving the right ventricle of the heart travels next to the

Lungs

Which of the follwoing sensory receptor types is not found in humans

Magnetroeceptors, We dont sense magnets

the majority of carbon dioxide is carried in the blood component called

Plasma

hand on a hot stove, info relayed to brain by the what?

Thalamus

One side of the heart pumps blood into the pulmonary circuit and the other side pumps blood to the systemic circuit how do these different functions affect the structure of the heart?

The left side of the heart has a thicker muscular wall than the right side

Which of the following does NOT facilitate exchange of materials by diffusion

The precence of the extracellular matrix within connective tissue

large blood vessels that return deoxygenated blood from the legs to the heart are

Viens

air that enters the lungs has

a higher concentration of oxygen and a lower concentration of carbon dioxide than air in an alveolus

the thing shown, lil thingy lil egg yoke

cell body

if the flomerulus remained intact but OTHer capilaris were not close physical contact with nephrons wich of the following functions would NOT be lost

filtration of plasma

a single hormone molecule can have dramatic effects on a target cell because

it initiates of a chain of event that amplify the effect

which of the following statements best explains how one hormone can regulate several different development events

one hormone can affect different types of target tissues in different ways

which of the following structures has the smallest diameter

the brocholi

when blood arrives at an alveolus

the carbon diox is HIGHER in the BLOOD than the alv

By what mechanisms do most hormones travel through the organism that produces them

the circulatory system

the steroid hormones testosterone, estadiol and progesterone enter cells that bind intracellular receptors to regulate gene expression, based on this information, which of th following statements about steroid hormones must be correct

they are mainly nonpolar and hydrophobic

the breaking open of Alveoli in peole who have emphysema decrease thier rate of gas exchange because

thier lungs have less surface area for diffusion

if you were to step on a nail what woutl NOT happen

this would not happen: Moto output in your leg would be interupted by your brain as senory imput