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Comp > Physiology > Flashcards

Physiology Flashcards

1
Q

What type of receptor does the PNS activate at an effector organ?

A

Muscarinic

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2
Q

An excitable membrane will become depolarized upon influx of which ion?

A

Na

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3
Q

Stimulation of which tract causes an involuntary contraction of an excitatory extensor?

A

Vestibiulospinal

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4
Q

Piling up of inadequate stimuli to threshold value and eventual action potential is termed?

A

Summation

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5
Q

Which is unique to cardiac muscles?

A

Contains intercalated discs

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6
Q

Motor units

A

Consist of a motor neuron and all of the muscle fibers it innervates

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7
Q

The ā€œIā€ bands in a sarcomere are made up of?

A

Actin

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8
Q

The greater the heart is filled during systole, the greater will be the force during systole. This is known as/

A

Starlings law

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9
Q

The p wave on a ekg represents

A

Atrial depolarization

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10
Q

What events results in the s1 heart sound?

A

Closure of AV valves

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11
Q

Which is present in both coagulation cascade pathways?

A

C-3

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12
Q

Total lung capacity can be defined as?

A

Vital capacity + residual vol

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13
Q

What is the respiratory adjustment to decreased CO2 in the blood?

A

Decreased respiration depth and rate

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14
Q

The greatest percentage of infiltrated water is reabsorded in the?

A

Proximal Convoluted Tubule

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15
Q

Lymphatic tissue is primarily found in?

A

Skin and Gut

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16
Q

Calcium absorption in the GI tract is increased by the action of which vitamin?

A

D

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17
Q

Which is not a protein difesting enzyme of the GI system?

A

Amylase

18
Q

The suckling reflex in the infant stimulates the release of which hormone from the posterior pituitary gland?

A

Oxytocin

19
Q

Testosterone is produced and secreted by?

A

Interstitial cells of Leydig

20
Q

When exercising a muscle which type of contraction does not change the length of the muscle?

A

Isometric

21
Q

When a neuron is in a facilitated state, the membrane of its soma is?

A

Close to threshold potential

22
Q

Which region of the brain inhibits contraction of skeletal muscle that opposes the intended movement?

A

Basal ganglia

23
Q

Slow pain fibers do all of the following except?

A

Activate spinal reflexes

24
Q

Which region of the brain regulates temperature control, food intake, and reproductive function?

A

Hypothalamus

25
Q

Which characteristic does cardiac muscle share with skeletal muscle?

A

It has sarcomeres

26
Q

Slow oxidative muscle fibers

A

Have smaller diameters than fast anaerobic fibers

27
Q

Which statement about visceral smooth muscle is true?

A

It can develop more tension per cubic centimeter than skeletal muscle

28
Q

When negative feedback processes are working correctly, failure of the thyroid gland to secrete thyroid hormone in response to thyroid stimulating hormone will result in?

A

Increase secretion of TSH

29
Q

Growth hormone secretion can be stimulated by all of the following except?

A

Elevated blood glucose

30
Q

Negative feedback regulation of FSH is provided by?

A

Testosterone

31
Q

Which physical characteristic enhances the ability of muscle cells to use oxygen?

A

Increased mitochondria

32
Q

Abnormally slow depolarization of the ventricles would most change the shape of the ____ in an ECG

A

QRS complex

33
Q

The vol of blood ejected from each ventricle during a contraction is called the?

A

Stroke volume

34
Q

Total peripheral resistance is related to all of the following except the?

A

Osmolarity of intersitial fluids

35
Q

When the diaphragm and external intercostals mucles contract

A

The volume of the thorax increases

36
Q

Most of the oxygen transported in the blood is ?

A

Bound to hemoglobin

37
Q

The ions in highest conc in the ECF are?

A

Sodium and chloride

38
Q

The glomerulus differes from other capillaries in the body that it

A

Is drained by an efferent arteriole

39
Q

The enzyme pepsin breaks down?

A

Proteins

40
Q

The mechanical and chemical receptors that control digestive activity are located?

A

In the walls of the tract organs

Comp (12 decks)

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