Please help with the following questions STAT, will rate. Provide complete answe
ID: 301872 • Letter: P
Question
Please help with the following questions STAT, will rate. Provide complete answers. Thank you Please help with the following questions STAT, will rate. Provide complete answers. Thank you
Which one of these is involved in adaptive and humoral immunity? O Neutrophils. O Macrophages Complement. Natural killer cells. O B-cells. D Question 35 After the depolarization phase of an action potential, the resting potential is restored by O the opening of voltage-gated sodium channels O the opening of voltage-gated potassium channels and the closing of sodium channels O a decrease in the membrane's permeability to potassium and chloride ions. O a brief inhibition of the sodium-potassium pump. O the opening of more voltage-gated sodium channels.
Explanation / Answer
Question 34:
ANSWER : B-CELLS
EXPLANATION: B-cells also called B- lymphocytes is a type of white blood cells which is involved in humoral immunity. B-cells is produced by the bone marrow in the bone. It defenses against the invading microorganisms or pathogens esspecially bacteria by producing antibodies. These antibodies circulate in the blood and binds with the pathogen and get destroyed.
QUESTION 35:
ANSWER : the opening of the voltage gated potassium channels and the closing of the sodium channels.
EXPLANATION: During action potential voltage gated sodium channels open and sodium enter into the cells causing depolarisation. After depolarisation the resting potential is restored by the opening of the voltage gated potassium channels and the closing of the sodium channels.
Question 36:
ANSWER: sustained opening of voltage gated potassium channels
EXPLANATION: After hyperpolarisation the action potential of the cells membrane potential falls below the normal resting potential. This is called UNDERSHOOT PHASE it is caused by sustained opening of voltage gated potassium channels.
QUESTION 37:
ANSWER: Increasing its membranes permiability to k+.
EXPLANATION: When membranes permiability to the potassium is increased it causes more amount of potassium enters into the cell and graded hyperpolarisation of a membrane can be induced.
QUESTION 38:
ANSWER: it wont be able to contract at all
EXPLANATION: Botulinum toxin prevents the release of neurotransmitter called acetylcholine.
Acetylcholine is important for the transmission of signals from one nerve cell to another. without the acetylcholine there will be no contraction in the muscle.