EXSC lab exam 2 practice

which of the following statements about muscle tissue are true? 1. skeletal muscle tissue is the only striated type of muscle 2. cardiac and smooth muscle respond to involuntary nervous signals 3. cardiac muscle is found only in the heart 4. smooth muscle of the esophagus contracts in peristaltic waves

2, 3, 4

How would you explain the path exhaled oxygen-poor and carbon dioxide-rich air takes to leave the body?

It passes through the bronchioles and tertiary and secondary bronchi in the lungs to the right or left bronchi, and then it goes into the larynx and up through the trachea to pass out of the body via the mouth or nose

if you were giving an oral report on the role smooth muscle plays in the process of digestion, which of the following points would you include in your presentation?

Through mechanical and chemical processes that occur in the alimentary canal - a musculomembranous tube that extends from the mouth to the anus-food is digested, nutrients are extracted, and waste is expelled

the pelvic bones articulate with the femur at the

acetabulum

the binding of ____ to the receptor on an ion channel causes the channel to open, allowing an influx of _______ ions into the muscle fibers

acetylcholine, sodium

the neurotransmitter released by the motor neurons that stimulates skeletal muscle is called

acetylocholine

sarcomeres contain

actin and myosin filaments

the bone that makes up the majority of the heel is the

calcaneus

smooth muscle can be found in which of the following systemsq

circulatory, respiratory and digestive

smooth muscle does all of the following except

contract voluntarily to move blood through the vasculature

the ______ is a conical pouch formed by the upper and left portion of the right ventricle that leads to the pulmonary trunk

conus arteriosus

the male pelvis is __________ and _______ than the female pelvis

deeper and narrower

Which layer of the heart wall adheres the heart to the pericardium, a sac of tissue that protects the heard from friction as it beats?

epicardium

arches of the foot do all of the following except: distribute stress, support body weight, absorb shock, facilitate eversion and inversion

facilitate eversion and inversion

which best describes the structural components of skeletal muscle from largest to smallest?

fascicle, fiber, myofibril, thick and thin filament

The carpal tunnel is bordered by the ________ and the _________

flexor retinaculum, carpal bones

smooth muscle contractions are _______ actions managed by impulses that travel through the ________ nervous system to the smooth muscle tissue.

involuntary, autonomic

if one of your peers asked you to explain the main function of the myocardium, how would you explain it?

it creates the pumping action that distributes blood throughout the cardiovascular system

If you were to describe the myocardium to a friend who is unfamiliar with its structure, which of the following would you be most likely to say?

it is made up of muscle fibers attached to fibrous rings

all of the following statements about cardiac muscle are true, except:

it is not striated

Which of the following is true about the scapula?

it is stabilized by muscles

how does cardiac muscle differ from skeletal muscle?

its fibers are shorter

the outermost smooth muscle layer of the stomach is the

longitudinal layer

the proteins within a muscle cell are organized into large cells called:

myofibrils

which step of muscle contraction is called the "power stroke"

myosin heads move the actin filaments inward, shortening the sarcomere

The place where an impulse is transmitted from a motor neuron to a skeletal muscle is called the

neuromuscular junction

which of the following is not a tarsal bone: calcaneus, cuboid, talus

none, all are tarsals

Which smooth muscle layer is found in the stomach but not in the rest of the alimentary canal?

oblique layer

_____ are specialized cardiac muscle cells that directly control heart rate.

pacemaker cells

the carpal bones articulate with all of the following except: ulna, radius, metacarpals, phalanges

phalanges

The knuckles are created by the articulation between the

phalanges and metacarpals

The three types of muscle tissue are

smooth, cardiac, skeletal

Smooth muscle lines all of the following body structures except

the brain

all of the following are part of the cardiac conduction system, except:

the chordae tendineae

which of the following occurs when the myosin heads bind to actin?

the cross bridges are established

which layer of the heart wall lines the heart's internal structures and is continuous with the lining of blood vessels that attach to the heart

the endocardium

which of the following is the layer of the blood vessel wall that consists of smooth muscle and elastic fibers

the tunica media

all of the following are characteristics of skeletal muscles, except:

they are under involuntary control

the fibular articulates with which of the following

tibia

contractions of smooth muscle in the _____ wall propel urine into the bladder

ureter