WorksheetsFIVIZZ: ROAD TO MIDSEM - BIOLOGY 3
Total questions: 17
Worksheet time: 17mins
Name the site where digestion of proteins occurs
Pancreas
Rectum
Liver
IIeum
The primary function of the cerebrospinal fluid is to:
Protect the brain
Provide nutrients to the surrounding tissues
Remove waste products
All of the above
A nerve impulse is
a flow of electrons along the outside of the plasma membrane of the neuron
the movement of cytoplasmic elements through the core of the neuron
a series of changes in membrane potentials
a lengthening and shortening of the membrane extensions of an individual neuron.
(a) act as an insulator around the axon.
at rest, a nerve cell has a high concentration of ________ inside and a high concentration of __________ outside.
sodium, potassium
potassium, sodium
calcium, sodium
potassium, calcium
When an action potential abruptly drops from positive to negative, this is because
potassium gates are inactivated and sodium gates are opened
sodium gates are inactivated and potassium gates are opened
both potassium and sodium gates are inactivated
both potassium and sodium gates are opened
What is the role of Ca2+ ions during a synaptic transmission?
generate an action potential
speed up the impulse transmission
depolarization of the synaptic knob
stimulates fusion of the vesicle synapse to the presynaptic membrane
what is the association between troponin and calcium in muscle fiber contraction.
calcium binds to troponin and reposition the tropomyosin
calcium binds to troponin and pulls the myosin to the actin
calcium disassociates from troponin and reposition the tropomyosin
calcium disassociates from troponin and pulls the myosin to the actin
(a) transfer vibrations from a bone to a fluid
The part of the ear where sound is transduced into nerve impulse is/are the
tympanic membrane
ossicle bones
semicircular canals
cochlea
The vertebrate ear possesses three semicircular canals to
provide backup if any one becomes damaged.
sense sound from all directions.
detect different frequencies of sound.
perceive motion in all directions.
images with high visual acuity are produced by ________ and images with high sensitivity are produced by _______.
hint: separate by coma
(a)
Which of the following statements is a characteristic of excitatory psychoactive drugs?
I. Fitting into the same receptors of neurotransmitter.
II. Causes continuous stimulation and contraction of muscles.
Ill. Destroys enzymes that break down neurotransmitter.
IV. Blocks the action of neurotransmitter at receptors.
I, II and III
I and III only
II and IV only
all of the above
Which of the following statements are true about the endocrine(ES) and nervous(NS) systems?
ES - action is slow
NS - action is fast
ES - action is long lasting
NS - action is short lasting
ES - action is broad
NS - action is narrow
ES - action occurs in embryos
NS - action starts at birth
The process that maintains homeostasis of body fluids is called (a)
Insulin resistance is associated with
low insulin secretion by the islets of Langerhans
type 1 diabetes
impaired function of receptors on target cells
hypoglycemia
Which of the following describes changes in the concentration of filtrate in the two portions of the loop of Henle?
Decreases in both portions
Increases in both portions
Increases in descending portion/ decreases in ascending portion
Remains essentially the same in both portions
