The rapid influx of which ion into a neuron is primarily responsible for the depolarization phase of an action potential?
Anonymous Quiz
30%
Potassium (K+)
54%
Sodium (Na+)
13%
Calcium (Ca2+)
3%
Chloride (Cl-)
Which neurotransmitter is primarily involved in muscle contraction and is also found in the central nervous system?
Anonymous Quiz
11%
Dopamine
15%
Serotonin
70%
Acetylcholine
5%
GABA
ā¤1
Which division of the nervous system is responsible for the 'fight-or-flight' response?
Anonymous Quiz
8%
Somatic nervous system
35%
Parasympathetic nervous system
13%
Central nervous system
44%
Sympathetic nervous system
ā¤8
In a typical reflex arc, which component directly transmits the signal from the sensory neuron to the motor neuron?
Anonymous Quiz
29%
Effector
31%
Receptor
34%
Interneuron
5%
Ganglion
Opioid drugs exert their effects by mimicking the action of which natural pain-relieving substances in the brain?
Anonymous Quiz
38%
Dopamine
35%
Endorphins
12%
Serotonin
15%
Acetylcholine
Which layer of the skin contains sensory receptors for touch, pressure, temperature, and pain?
Anonymous Quiz
47%
Epidermis
26%
Hypodermis
20%
Dermis
7%
Subcutaneous layer
Which of the following is NOT considered one of the primary taste sensations detected by the tongue?
Anonymous Quiz
13%
Salty
33%
Umami
44%
Spicy
9%
Bitter
ā¤3
The specialized sensory cells responsible for detecting odors are located in which part of the nasal cavity?
Anonymous Quiz
15%
Nasal septum
68%
Olfactory epithelium
14%
Conchae
3%
Sinuses
The myelin sheath around an axon primarily serves to:
Anonymous Quiz
13%
Produce neurotransmitters
17%
Slow down nerve impulse transmission
68%
Insulate the axon and speed up transmission
2%
Regenerate damaged axons
Why are reflex actions generally faster than voluntary responses?
Anonymous Quiz
28%
They involve more complex brain processing
17%
They bypass the brain entirely
19%
They do not involve neurotransmitters
36%
They have fewer synapses in the neural pathway
The movement of water molecules from higher water potential to lower water potential is called______
Anonymous Quiz
74%
A. Osmosis
14%
B. Simple diffusion
11%
C. Active transport
1%
D. Endocytosis
A car accelerates uniformly from rest to a speed of 20 m/s in 10 seconds. What is the acceleration of the car?
A) 1 m/sĀ²
B) 2 m/sĀ²
C) 5 m/sĀ²
D) 10 m/sĀ²
Write your answer under the comment! š
A) 1 m/sĀ²
B) 2 m/sĀ²
C) 5 m/sĀ²
D) 10 m/sĀ²
Write your answer under the comment! š
ā¤5š¢1
Suppose that A and B are 3 Ć 3 matrices, I is identity matrix of order 3 such that AB = 2I. |B| = 6, what is det(A^T)?
Anonymous Quiz
23%
1/3
42%
4/3
22%
12
14%
48
Which of the following is Not power function?
Anonymous Quiz
44%
y = 2
17%
y = 2xĀ²
13%
y = x
26%
y = x + 1
š1
Two dice are rolled and the numbers on top are added. What is the probability that the sum is less than 4?
Anonymous Quiz
12%
5/36
23%
5/6
27%
1/6
37%
1/12
ā¤1
If a die is thrown, then S = {1, 2, 3, 4, 5, 6}. Let E be an event of getting number 7, then E is:
Anonymous Quiz
15%
Simple event
18%
Compound event
61%
Impossible event
6%
Certain event
Which one of the following animal is different from the others?
Anonymous Quiz
54%
Mamals
23%
Fish
11%
Amphibian
12%
Reptile
ā¤2
Based on the degree of ionization of in aqueous solution both acid and base are classified:
Anonymous Quiz
29%
Dilute and concentrated
60%
Strong and weak
7%
Concentrated and weak
4%
None of above
ā¤4š1
How many chain isomers are there for an alkane that contains 7 carbon atoms?
Anonymous Quiz
13%
8
25%
9
43%
14
19%
16