BSC1005 Exam 3

When is an unborn child called a fetus?

From the 9th week of pregnancy to birth

Organs are made up of ________ to perform a specific function.

different types of tissues

Where does the ovule meet the sperm that fertilizes it?

In the oviduct

What is a population's carrying capacity?

Its maximum population size to remain stable

Which growth model would you expect to see in a stable population?

Logistic

What is the role of the epiglottis?

Prevents food from entering the windpipe

Identify the primary role of the lymphatic system.

Produce and store large numbers of white blood cells

What is chemical digestion?

The breakdown of food by enzymes

What do survivorship curves display?

The change that an individual will live to a particular age

What is an action potential?

The electric signal used by neurons to transfer information

Human birth rate peaked in the 1980s and has been slowly declining ever since. How is this expected to affect our population size over the next several decades?

The human population size will continue to increase, but not as fast as before.

What is mechanical digestion?

The use of physical actions to break down food

Which of the following is a similarity between male and female reproductive systems?

They both store gametes.They both produce haploid gametes.They both release gametes.

Choose the defining characteristic of all arteries.

They only carry blood away from the heart.

What is the main role of the peripheral nervous system?

To convey information to and from the central nervous system

What is the primary function of the sinoatrial node?

To initiate the contraction of the heart

What is the main role of T cells in the immune response?

To stimulate the production of immune cells

Which medication prevents viral infections by priming the immune system against a specific virus?

Vaccines

What would happen if the sensory neurons in your hand could not transmit a signal?

You could move your fingers but you could not feel something touch them.

Form refers to ________, and function refers to ________.

anatomical structure; physiological actions

The cardiovascular system consists of ________.

blood, heart, blood vessels

Ecology is a science that can be carried out by ________.

both learning by observing and running experiments to test hypotheses

The spinal cord is part of the ________ nervous system.

central

The release of an egg from an ovary is called ________.

ovulation

Tissues are made up of ________ that work together to perform a function.

similar cells

Most of the absorption of nutrients (besides water) takes place in the ________.

small intestine

What are lymphocytes?

white blood cells

Which of the following forms of contraception is removable?

An intrauterine device

Which type of white blood cells produces defensive proteins called antibodies?

B cells

Select the correct sequence for the pathway of blood through the heart.

Body, Right atrium, Right ventricle, Lungs, Left atrium, Left ventricle, Body

What are the four stages of food processing, ordered from beginning to end?

Ingestion, digestion, absorption, elimination

What is the correct hierarchy of organization, from biggest to smallest, in your body?

Organism, organ system, organ, tissue, cell

What are gonads?

Organs that produce gametes

An age pyramid with a broad base that quickly slopes up to a narrow top would be indicative of ________.

a developing nation

A population in ecology is defined as ________.

a group of organisms, all from the same species

Environmentalism is ________.

a philosophical and social movement concerned with preserving the environment

An essential nutrient is specifically a nutrient that your body ________.

cannot make by itself

Which are the thinnest blood vessels?

capillaries

The systemic circuit specifically circulates blood ________.

from the heart to the rest of the body

In spermatogenesis, ________.

haploid sperms are produced

The urethra ________.

is a tube that conveys both urine and semen

An ecosystem is a collection of all the ________ in a given area.

living and nonliving things

Ecology is best defined as the study of ________.

the interactions between living organisms and their environments

Genital herpes is a sexually transmitted disease caused by a ________.

virus

What causes a stomach ulcer?

A bacterial infection

Which of the following correctly explains what a heart attack is?

Arteries that supply the heart with oxygen become blocked.

Bacteria populations grow at a really rapid pace, with their whole populations doubling within hours. What type of growth models do bacteria follow?

Exponential

Sound is "heard" when sound waves cause structures inside your ears to physically vibrate. A signal is then sent to your brain where it is interpreted as sound. What type of receptor in the ear is responsible for the sense of hearing?

Mechanoreceptors

What carries a signal from one neuron to the next?

neurotransmitter

Abiotic factors are ________.

nonliving components of an ecosystem

The main role of the liver is to ________.

produce bile, which helps the process of digestion

A dispersion pattern refers to ________.

the spacing of organism throughout a habitat

Which of the following statements is correct? 1. Our body cannot make any of the 20 amino acids and needs proper nutrition to acquire them. 2. Our body does not require any amino acids to function properly. 3. Our body can make a subset of the 20 amino acids, and needs proper nutrition to acquire the ones it cannot make. 4. Our body can make all 20 amino acids needed.

3. Our body can make a subset of the 20 amino acids, and needs proper nutrition to acquire the ones it cannot make.