Tag: biology

Questions Related to biology

Largest muscle of human body is

biology movement and locomotion in man types of muscles muscles muscles and their structure muscle contraction

  1. Stapedium

  2. Quadriceps

  3. Gluteus maximus 

  4. Masseter

Show answer
Correct Option: C
Explanation:

The gluteus maximus is the largest muscle in the human body. These muscles help move the hips and thighs and also keep the trunk of the body in upright position. These muscles work against the gravity when we are walking up stairs. So, the correct answer is 'Gluteus maximus'.

Which of the following muscle types CNNOT be used valuntarily.

biology movement and locomotion in man types of muscles muscles muscles and their structure muscle contraction

  1. Both striated and smooth

  2. Both cardiac and striated

  3. Both smooth and cardiac

  4. Cardiac,striated and smooth

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Correct Option: C

The two muscles which help in thermoregulaton of the scrotum moving it up or down depending on outside temperature are

biology movement and locomotion in man types of muscles muscles muscles and their structure muscle contraction

  1. Gastrocnemius and Flexor longus

  2. Cremaster and Danos muscle

  3. Adductor longus and Abductor flexor

  4. Flexor longus-Cremaster

Show answer
Correct Option: A

Which of these tissues is responsible for contractions that allow the movement of the body?

biology movement and locomotion in man types of muscles muscles muscles and their structure

  1. Muscle

  2. Nervous

  3. Epithelial

  4. Connective

Show answer
Correct Option: A
Explanation:

Skeletal muscles are involved in contraction and relaxation. An action potential travels through the motor neuron. The motor neurons are linked to the muscle fibers at the neuromuscular junction. When this nervous signal reaches the neuromuscular junction the neurotransmitter called acetylcholine is released. This neurotransmitter binds to the receptors on the surface of the muscle fiber leading to muscular contraction. Thus the correct answer is option A.

Standing on tip toe is an example of

biology movement and locomotion in man types of muscles muscles muscles and their structure

  1. Elevation

  2. Flexion

  3. Extension

  4. Retraction

Show answer
Correct Option: A
Explanation:
  • Joints are points of contact between bones, or between bones and cartilages.
  • Synovial joints are characterized by the presence of a fluid-filled synovial cavity between the articulating surfaces of the two bones. These joints help in locomotion and many other movements. The hinge joint is a type of synovial joint.
  • extension refers to movement in the posterior direction. For example, when standing up, the knees are extended.
  • Hence standing on tiptoe(HINGE JOINT AT ANKLE) is an example of an extension.
  • So, the correct answer is 'Elevation'.

Which of the following muscles move the lower jaw, tongue and the head backward?

biology movement and locomotion in man types of muscles muscles muscles and their structure

  1. Abductor

  2. Retractor

  3. Proctor

  4. All of the above

Show answer
Correct Option: B
Explanation:
  • A muscle that draws a body part backward is called Retractor.
  • For example, The horizontal fibers of the temporalis muscle serve to retract the mandible(lower jaw).
  • Hence retractor muscles move the lower jaw, tongue and the head backward.
  • So,the correct answer is 'Retractor'.

Cytoplasm of a muscle cell is?

biology movement in animals types of muscles muscles muscles and their structure muscle contraction

  1. Neuroplasm

  2. Sarcoplasm

  3. Axoplasm

  4. Sarcolemma

Show answer
Correct Option: B
Explanation:

  • Sarcoplasm is the cytoplasm of a myocyte (muscle fibre, muscle cell).
  •  It is comparable to the cytoplasm of other cells, but it contains unusually large amounts of glycosomes (granules of stored glycogen) and significant amounts of myoglobin, an oxygen-binding protein. Hence, the Cytoplasm of a muscle cell is sarcoplasm.
So, the correct answer is 'sarcoplasm'.

Muscles contain a red coloured oxygen storing pigment called _______________.

biology movement in animals types of muscles muscles muscles and their structure muscle contraction

  1. Haemoglobin

  2. Myoglobin

  3. Erythrocruorin

  4. Haemolymph

Show answer
Correct Option: B
Explanation:

  • Myoglobin is an iron- and oxygen-binding protein found in the muscle tissue of vertebrates in general and in almost all mammals. 
  • It is distantly related to haemoglobin which is the iron- and oxygen-binding protein in blood, specifically in the red blood cells. Hence, Muscles contain a red coloured oxygen-storing pigment called myoglobin.
So, the correct answer is 'myoglobin'.

Muscle contains a red coloured oxygen containing pigment called

biology movement in animals types of muscles muscles muscles and their structure muscle contraction

  1. Rhodopsin

  2. Myoglobin

  3. Hemocyanin

  4. Both A and B

Show answer
Correct Option: B
Explanation:

  • Muscle contains a red coloured oxygen-containing pigment called myoglobin. It is similar to hemoglobin pigment that stores oxygen in the blood cells. Myoglobin binds oxygen with its heme group.

Thus, the correct answer is 'Myoglobin.'

Match the following and find correct combination.

$(a)$ Abrin $(i)$ Lectin
$(b)$ GLUT-4 $(ii)$ Intercellular growth substance
$(c)$ Collagen $(iii)$ Hormone
$(d)$ Concanavalin $(iv)$ Enables glucose transport into cells
$(v)$ Toxin
biology movement in animals types of muscles muscles muscles and their structure muscle contraction

  1. $a - iii, b - iv, c - ii, d - i$

  2. $a - v, b - iv, c - ii, d - i$

  3. $a - iii, b - iv, c - ii, d - v$

  4. $a - iii, b - v, c - ii, d - i$

Show answer
Correct Option: B
Explanation:
Abrin is a highly toxalbumin found in the seeds of rosary pea.
Concanavalin A is a lectin extracted from jack bean,  and used to purify glycosylated molecules in lectin. 
Collagenis a intracellular growth substance. 
GLUT 4 is the insulin regulated glucose transporter found in the adipose tissues. 
So the correct answer is B.