Locomotion and Movement

Question 1

The number of vertebrae in a human is ________.

Accepted Answer

26. An adult human vertebral column has 26 vertebrae: 7 cervical, 12 thoracic, 5 lumbar, then the sacrum and the coccyx, each of which is a set of vertebrae fused into a single bone. 7 and 12 are the cervical and thoracic counts alone, and 206 is the total number of bones in the body.

Answer

7

Answer

12

Answer

206

Question 2

Which of the following represents the correct sequence of arrangement of bones in the lower limb of humans?

Accepted Answer

Femur-patella-tibia-tarsal. Working down from the hip: the femur is the thigh bone, the patella is the kneecap covering the joint below it, the tibia is the shin, and the tarsals form the ankle. Any sequence putting the patella before the femur or the tarsals before the tibia has the leg in the wrong order.

Answer

Femur-tibia-patella-tarsal

Answer

Patella-femur-tibia-tarsal

Answer

Femur-tarsal-patella-tibia

Question 3

Muscle contraction is initiated by a signal sent by the central nervous system by the release of _____.

Accepted Answer

acetyl choline. The motor neuron meets the muscle fibre at the neuromuscular junction, and the signal crosses that gap chemically: acetylcholine is released and generates an action potential in the sarcolemma. Acetyl coenzyme A belongs to respiration, and the cyclic nucleotides are second messengers inside cells.

Answer

acetyl coenzyme A

Answer

cyclic guanine monophosphate

Answer

cyclic adenine monophosphate

Q1.The number of vertebrae in a human is ________.

Q2.Which of the following represents the correct sequence of arrangement of bones in the lower limb of humans?

Q3.Muscle contraction is initiated by a signal sent by the central nervous system by the release of _____.