Test 1

1.

1 point

7) Gap junctions

A) coordinate ciliary movement among epithelial cells.

B) coordinate the contractions of cardiac muscle cells.

C) facilitate the propagation of action potentials from one cell to the next at electrical synapses.

D) all of the above

E) none of the above

2.

1 point

11) Extracellular membrane receptors are used by which of the following types of hormones?

A) catecholamines

B) peptide hormones

C) eicosanoids

D) all of the above

E) none of the above

3.

1 point

1) All of the following are true of the nervous system, except that it doesn't

E) function independently of the endocrine system.

B) respond specifically to stimuli.

C) communicate by the release of neurotransmitters.

A) respond rapidly to stimuli.

D) respond with motor output.

4.

1 point

5) Each of the following hormones is an amino acid derivative, except

A) epinephrine.

B) norepinephrine.

C) thyroid hormone.

D) thyroid-stimulating hormone.

E) melatonin.

5.

1 point

8) ________ are chemical messengers that are released in one tissue and transported in the bloodstream to alter the activities of specific cells in other tissues.

C) Neurotransmitters

A) Hormones

B) Neuropeptides

D) Humoral antibodies

E) none of the above

6.

1 point

4) Peptide hormones are

E) chemically related to cholesterol.

B) produced by the adrenal glands.

D) lipids.

A) composed of amino acids.

C) derived from the amino acid tyrosine.

7.

1 point

6) Hormones can be divided into different groups based on their chemistry. These categories include

A) peptides.

B) steroids.

C) eicosanoids.

D) amino acid derivatives.

E) all of the above

8.

1 point

3) Hormones known as "catecholamines" are

A) lipids.

C) steroids.

B) peptides.

E) derivatives of reproductive glands.

D) amino acid derivatives.

9.

1 point

2) Endocrine structures

C) release their secretions directly into body fluids.

D) contain few vesicles.

B) release their secretions onto an epithelial surface.

A) are a type of nerve cell.

E) are modified connective-tissue cells.

10.

1 point

10) The functional organization of the nervous system parallels that of the ________ system in many ways.

E) hepatic

D) muscular

B) cardiovascular

C) body

A) endocrine

11.

1 point

9) Norepinephrine and epinephrine are considered to be ________ when released into the bloodstream, but ________ when released at synapses.

A) hormones; neurotransmitters

E) neuropeptides; neurohormones

D) neurotransmitters; neuropeptides

B) neuropeptides; neurotransmitters

C) neurotransmitters; hormones