Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

BIOL 3211: Physiology > Exam 2 Questions > Flashcards

Exam 2 Questions Flashcards

1
Q

Tetrapods (birds, mammals, amphibians) have two circuits within their circulatory system. The one that pushes blood throughout the lungs is called the:

A

pulmonary circuit

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the sequence of the muscle structures from largest, most inclusive, to smallest?

A

muscle, fascicle, muscle fiber, myofibiril, thick filament

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

In order for high force cross bridges to form in contracting skeletal muscle, calcium must:

A

bind to troponin which moves the tropomyosin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

ECGs

A. provide direct information about the heart function

B. are most useful in diagnosing heart murmurs

C. show the summed electrical potentials generated by all cells of the heart

D. have two major components: waves and nodes

E. measure mechanical activity of the heart

A

C. show the summed electrical potentials generated by all cells of the heart

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is not a characteristic of insect (arthropod) hearts?

A

The pacemaker cells in an insect heart are very similar to those in a mammalian heart

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Females of some parasitic wasps exhibit “calling behavior” while still within the cocoon. They are expectantly greeted by males as soon as the eclose (come out of tehir cocoon as sexually mature adult wasps). What type of chemical signal is described?

A

pheromone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

a vertebrate hormone involved in water and electrolyte balance in the body would be:

A

aldosterone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

a person whose anterior pituitary could not mace ACTH would probably have:

A

higher than normal levels of CRH and lower than normal levels of cortisol

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

production of this hormone from the adrenal medulla is under the control of negative feedback on the nervous system:

A

norepinephrine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Which of the following effects would you expect to result from severing the bundle of His?

A

the ventricles would not contract normally.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Which of the following statements about oxytocin is true?

A. involved with the stress response and pair bonding

B. oxytocin is synthesized in the hypothalamus

C. Oxytocin is secreted by the anterior pituitary gland

D. both choices A and B

E. All of the choices are true

A

D. both choices A and B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

The term that describes the volume of blood circulated by the heart in one minute is:

A

cardiac output (CO)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

According to the sliding filament mechanism, during a muscle contraction, myosin pulls actin filaments towards the center fo a sarcomere, causing the entire sarcomere to shorten

A. True

B. False

A

A. True

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

The main difference beteween the modes of action of peptide hormones and steroid hormones is that…

A

peptide hormones bind to receptors on the cell surface whereas steroid hormones bind to intracellular receptors

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Which of the following is composed of myosin protein:

A. thick filaments

B. thin filaments

C. all myofilaments

D. Z discs

E. both A and D

A

A. thick filaments

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Which gland secretes a hormone that decreases osteoclast (bone destroying cells) activity?

A

thyroid

17
Q

The relaxation of skeletal muscle relies on the activity of the ________, which deceases cytoplasmic calcium concentration.

A

Ca2+ ATPase

18
Q

Which of the following is least likely to cause increased activity by the thyroid gland?

A. increased levels of TRH

B. increased levels of TSH

C. Low body temp

D. iodine deficiency

E. Injection of T3 and T4 into the blood

A

E. Injection of T3 and T4 into the blood

19
Q

among all animal taxa, what is NOT one of the essential components of a circulatory system?

A

oxygen

20
Q

exocrine secretions are used

A. to digest food

B. to communicate between different animals

C. in trapping prey

D. all of the above

A

D. all of the above

21
Q

Chronological sequence of action potentials:

1.

2.

3.

4.

A
  1. Acetylcholine binds to receptors on the motor end plate
  2. End plate potentials trigger action potentials
  3. Transverse tubules convey potentials to the interior of the cell
  4. Ca2+ is released from the sarcoplasmic reticulum
22
Q

Which endocrine organs are alike in having two distinct parts, one of neural origin and the other of glandular epithelium?

A

pituitary and adrenal glands

23
Q

as ATP binds to the myosin head at the beginning of a muscle contraction cycle, the myosin head immediately:

A

detaches from actin

24
Q

action potentials in the SA node of the heart would not occur without:

A

the SA node depolarizes spontaneously, without the need for external stimulation

25
Q

Which of the following statements is NOT true of the endocrine system?

A. It is one of two major regulatory systems of the body

B. It is composed of galnds that secrete chemical messengers into the blood

C. It is an important regulator of homeostatic mechanisms

D. it influences and is influenced by the nervous system

E. all of the choices are true

A

E. all of the choices are true

26
Q

What order would blood returning to the heart from teh body pass through?

A
  1. right atrium
  2. right ventricle
  3. pulmonary artery
  4. pulmonary vein
  5. left atrium
  6. left ventricle
27
Q

which valves have chordae tendinae?

A

bicuspid (mitral) and tricuspid valves

28
Q

smooth muscle is found in the irises of the eye and in the blood vessles.

A. True

B. False

A

A. True

29
Q

What is the general effect of hormones produced from thyroglobulin?

A

increased cellular metabolism

30
Q

The importance of the plateau phase of the action potential of myocardial cells is in:

A

preventing tetanus

31
Q

DHP receptors are directly activated by what?

A

voltage changes in the T-tubules

32
Q

what is NOT a function of the muscular system?

A

production of blood cells

33
Q

the intercalated disks of the myocardium are important because they

A

allow action potentials to spread from cell to cell

34
Q

regarding the structure and synthesis of hormones, which statement is correct?

A

steroid hormones are synthesized from cholesterol

BIOL 3211: Physiology (11 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions