Quiz 2
The falling phase of the action potential is due primarily to A) K+ flow out of the cell only. B) Na+ flow out of the cell only. C) Na+ flow in the cell only. D) K+ flow into the cell only. E) Na+ flow out of the cell and K+ flow into the cell.
A)
The larger the receptive field, the A) more primary sensory neurons synapse on a secondary sensory neuron. B) larger the area of the somatosensory cortex in the brain that perceives the sensation. C) stronger the stimulus intensity required to activate a sensory receptor. D) fewer primary sensory neurons are involved.
A)
Which brain area is considered to be a key integrating center for homeostasis? A) hypothalamus B) medulla C) pituitary gland D) thalamus E) brain stem
A)
Which statements apply to the parasympathetic division of the nervous system? A) It is dominant during "resting and digesting" and its ganglia are nearby, on or near their target organs. B) All of the statements apply. C) Its ganglia are nearby, on or near their target organs. D) It is dominant during "resting and digesting." E) Epinephrine is the primary neurotransmitter of the parasympathetic division.
A)
Two hormones that have opposing effects are called ______
Antagonistic
Autonomic motor neurons are subdivided into the A) visceral and enteric divisions. B) sympathetic and parasympathetic divisions. C) somatic and enteric divisions. D) visceral and somatic divisions. E) central and peripheral divisions
B)
Each of the following hormones is an amino acid derivative except one. Identify the exception. A) thyroid hormone B) thyroid-stimulating hormone C) epinephrine D) melatonin E) norepinephrine
B)
Phasic receptors A) once threshold is reached by a stimulus will always generate action potentials B) are quick to adapt to a particular stimulus intensity. C) slowly decrease the frequency of action potentials generated to a constant stimulus. D) are attune to parameters that the body must continuously assess.
B)
The brain and spinal cord together compose the A) somatic motor division of the nervous system. B) central nervous system. C) autonomic division system. D) visceral nervous system. E) peripheral nervous system.
B)
Which ion(s) is/are higher in concentration inside the cell compared to outside? A) chloride B) potassium C) sodium D) More than one of the answers is correct. E) calcium
B)
Which of the following would be an adequate stimulus for a chemoreceptor? A) cold temperature B) oxygen C) cell stretch D) vibration E) photon of light
B)
The pituitary hormone that stimulates milk production by the mammary glands is A) FSH B) prolactin C) growth hormone. D) ACTH E) TSH.
B) prolactin
The central opening in the eye through which the light passes on to the retina is the A) fovea B) conjunctiva C) pupil D) cornea E) lens
C)
The resting membrane potential results from A) activity of the sodium/potassium pump. B) uneven distribution of ions across the cell membrane. C) uneven distribution of ions across the cell membrane and differences in membrane permeability to Na+ and K+. D) differences in membrane permeability to Na+ and K+. E) None of the answers are correct.
C)
There are ________ primary taste (gustation) sensations. A) 2 B) 20 C) 5 D) 4 E) 400
C) 5
When voltage-gated Na+ channels of a resting neuron open, A) Na+ enters the neuron. B) Na+ leaves the neuron. C) Na+ enters the neuron and the neuron depolarizes. D) the neuron depolarizes. E) Na+ leaves the neuron and the neuron depolarizes
C) Na+ enters the neuron and the neuron depolarizes
An area of the retina that contains only cones and is the site of sharpest vision is the A) optic disc. B) tapetum lucidum. C) fovea. D) outer segment. E) inner segment.
C) fovea
Inhibitory postsynaptic potentials (IPSPs ) A) prevent the escape of calcium ions. B) result in local depolarizations. C) prevent the escape of potassium ions. D) result in local hyperpolarizations. E) increase membrane permeability to sodium ions.
D)
Language and verbal skills tend to be ________ side of the brain of right-handed people. A) randomly located with respect to the left or right B) concentrated on the right C) equally distributed between the left and right D) concentrated on the left
D)
Neurotransmitters are released from the A) collaterals. B) dendrites. C) synapse. D) axon terminals. E) axon hillock.
D)
The region where the axon terminal meets its target cell is called the A) hillock. B) nerve. C) collateral. D) synapse. E) dendrites.
D)
The loudness or intensity of a sound wave is related to its A) pitch B) frequency. C) duration. D) amplitude.
D) amplitude
An important structure in both learning and memory is the A) medulla. B) cerebellum. C) pons. D) hippocampus. E) hypothalamus.
D) hippocampus
The bones within the middle ear connect the A) cochlea to the tympanic membrane. B) oval window to the round window. C) tympanic membrane to the round window. D) cochlea to the oval window. E) tympanic membrane to the oval window.
E)
Which of the following is NOT a somatosensory modality? A) temperature B) proprioception C) nociception D) touch E) vision
E)
The pituitary hormone that controls hormone synthesis and release from the thyroid gland is A) LH B) ACTH C) FSH D) STH E) TSH
E) TSH
Graded potentials that arrive at postsynaptic neurons are called ________ if they make that cell less likely to fire
IPSP's
The outer layer of the adrenal gland is called the ______
adrenal cortex
________ is a decrease in the number of receptors of target cells in order to dampen the effects of excess hormone.
down regulation
The hormones of the anterior pituitary are controlled by trophic hormones from the _______
hypothalamus
The gaps between adjacent Schwann cells on an axon are called ________
nodes
Drug type: Blocks secretion of pancreatic enzymes
parasympathetic antagonist
Drug type: Blocks urination
parasympathetic antagonist
The term that describes the need for one hormone to be present for a second hormone to produce a full effect is called ______
permissiveness
Drug Type: Blocks secretion of adrenal catecholamines
sympathetic antagonist
Drug type: blocks sweating
sympathetic antagonist
