Cbio study

The \_______ secrete(s) \_________, which promotes Na+ and water retention.

Adrenal cortex; aldosterone

Steroid hormones exert their action by \________.

a. Entering the cell and activating mitochondrial DNA

c. Activating the hypothalamic release of regulating hormones

d. Entering the nucleus of a cell and initiating or altering the expression of a gene

Entering the nucleus of a cell and initiating or altering the expression of a gene.

The parathyroid glands respond to which type of stimiulus?

Humoral

Choose the type of stimulus described as when a molecule (that is not a hormone or a neurotransmitter) causes the release of a hormone?

Humoral

Thyrotropin-releasing hormone targets which of the following endocrine glands?

a. Anterior pituitary

b. Hypothalamus

c. Adrenal gland

d. Thyroid gland

Anterior pituitary

The posterior lobe of the pituitary gland is not a true endocrine gland because\_______.

It is only a hormone storage area that receives hormones from the hypothalamus for release

Which of the following endocrine organs secretes growth hormone?

a. Adrenal glands

b. Posterior pituitary

c. Thyroid

d. Anterior pituitary

Anterior pituitary

If the parasympathetic nerves to the heart were cut, the result would be that \____.

a. The heart rate would increase by about 25 beats per minute

b. The heart would stop, since the vagal nerves trigger the heart to contract

c. The atrioventricular (AV) node would become the pacemaker of the heart

d. Sympathetic stimulation would increase, causing a decrease in heart rate

The heart rate would increase by about 25 beats per minute

Name the feature on an electrocardiogram (ECG) that represents atrial depolarization:

P wave

What mechanical event begins during the P wave of an electrocardiogram?

Atrial systole

At the start of ventricular diastole, which of the following will happen:

The semilunar valves close

A person with no ADH secretion (diabetes insipidus) might have symptoms including these:

extreme thirst and dehydration

The symptom is not a result of hyperthyroidism:

myxedema

In women excess androgens secreted by the adrenal cortex can cause excessive facial hair, acne and increased sex drive. T/F

True

If a person who has diabetes mellitus forgot to take an insulin injection, this symptom may soon appear

a. acidosis

b. hyperglycemia

c. increase urine production

d. lethargy and fatigue

e. all of the above

all of the above

The thymus gland secretes a hormone that is involved in this

maturation of T lymphocytes

The endocrine imbalance would cause hypoglycemia:

hypersecretion of insulin

Hypersecretion of cortisol (causing Cushing's syndrome) has these symptoms except:

low blood pressure

Hypersecretion of growth hormone has this effect:

a. results in giantism in children

b. causes acromegaly in adults

c. increases the probability that one will develop diabetes

d. can lead to severe athrosclerosis

e. all of the above

all of the above

If parathyroid hormone levels increase, the effect is expected:

osteoclast activity is increased

Insulin increases this:

the uptake of glucose by its target tissues

Anti-inflammatory drugs such as aspirin inhibit prostaglandin synthesis and as a result, reduce inflammation and pain. T/F

True

Aldosterone:

increases sodium concentration in the blood

This is the primary effect of T3 and T4

increase metabolism

The main hormone responsible for maintaining pregnancy is this:

progesterone

This hormone is not a hormone that is secreted into the hypothalamohypophyisial portal system:

ACTH

The target tissue of glucagon is this:

liver (or skeletal muscle)

This hormone helps to maintain blood glucose levels by stimulating gluconeogenesis:

cortisol

Mammary glands are target for this hormone:

oxytocin and prolactin (a and b)

This hormone is released in response to high blood calcium levels:

calcitonin

The releasing and inhibiting hormones are produced by this:

hypothalamus to control anterior pituitary

The statement about the pituitary gland is true:

a. develops from the floor of the brain

b. develops from the roof of the mouth

c. both a and b

both a and b

The anterior pituitary gland is also called this:

adenohypophysis

The thyroid gland is located here:

inferior to the larynx and anterior to the trachea

This hormone is not secreted by the pancreas

glucocorticoids

The hormones secreted from the adrenal medulla:

have the same effect as the sympathetic nervous system

Given these valves:

1. aortic semilunar valve

2. bicuspid valve

3. pulmonary semilunar valve

4. tricuspid valve

Arrange them in the order in which an erythrocyte would pass through them after returning to the heart from the left arm

4,3,2,1

Given these structures of the conduction system of the heart:

1. atrioventricular bundle

2. AV node

3. bundle branches

4. Purkinje fibers

5. SA node

Choose the arrangement that lists the structures in the order an action potential passes through them

a. 25134

b. 25314

c. 52134

d. 25413

5,2,1,3,4

In a person who has a damaged left ventricle due to a heart attack, they would experience this:

a. left and right ventricle pumps less blood than the right

b.blood accumulates in the pulmonary vessels

c.blood accumulates in the systemic vessels

d. won't have any effect

e.both a and b

left and right ventricle pumps less blood than the right, blood accumulates in the pulmonary vessels (both a and b)

Damage to this part of the brain would cause the body to have less control over cardiac activity:

a. cerebral cortez

b. thalamus

c. basal nuclei

d. medulla oblongata

medulla oblongata

A blood clot in the anterior interventricular artery would cause a myocardial infarction in this area:

a. left atrium and posterior left ventricle

b. anterior walls fo the left and right ventricles, and interventricular septum

c. posterior walls of the left and right ventricles

d. lateral walls of the right atrium and right ventricle

anterior walls fo the left and right ventricles, and interventricular septum

This condition observed in an ECG suggest that the AV node is not conducting action potentials:

a. complete lack of the P wave

b. complete lack of the QRS complex

c. more QRS complexes than P waves