Animal Tissues : Muscular | Tissues | Assessment | English | Grade 9

A tissue which is composed of cells that contract and relax in order to produce movement is called ______.

• Epithelial tissue

• Connective tissue

• Muscular tissue

• Nervous tissue

Answer explanation

A tissue which is composed of cells that contracts and relax in order to produce movement is called muscular tissue.

Tags

NGSS.MS-LS1-3

The muscle that is attached with bone is called _____.

• Skeletal muscle

• Smooth muscle

• Cardiac muscle

• Nonstriated muscle

Answer explanation

The muscle that is attached with bone is called skeletal muscle.

Which of the following is the muscular tissue that functions throughout the life without fatigue?

• Striated muscle

• Smooth muscle

• Cardiac muscle

• Nonstriated muscle

Answer explanation

The heart beats continuously throughout the life, without fatigue. The muscular tissue present in heart is cardiac muscle. Therefore cardiac muscle functions throughout the life, without fatigue.

Identify the muscular tissue shown in the following figure.

• Striated muscle

• Smooth muscle

• Cardiac muscle

• Voluntary muscle

Answer explanation

In the given figure, alternate bands of dark and light colors are observed. The cells are cylindrical, branched and uninucleate. As well as in figure, alternate bands of dark and light colors are observed. We know that cells of cardiac muscles are cylindrical, branched and uninucleate. And when it is observed under microscope, alternate bands of dark and light colors are observed. Therefore given figure is of cardiac muscular tissue.

Which of the following activity is involuntary movement?

• Movement of hand

• Movement of stomach

• Movement of legs

• Movement of neck

Answer explanation

The movements that our under our control are called voluntary movements So we can move hands, legs and neck as per our will and we can control their movement. Therefore all of these are voluntary movements. But the movement of stomach is not under our control and we can not move it as per our will. Therefore movement of stomach is involuntary movement.

Rohan was doing exercise using dumbbells. Which of the following option is true with respect to movements of his hand?

• When he moves dumbbell up, biceps contracts and tricep relaxes When he moves dumbbell down, bicep relaxes and tricep contracts

• When he moves dumbbell up, bicep relaxes and tricep contracts When he moves dumbbell down, bicep contracts and tricep relaxes

• When he moves dumbbell up, bicep contracts and tricep contracts When he moves dumbbell down, bicep relaxes and tricep relaxes

• When he moves dumbbell up, bicep relaxes and tricep relaxes When he moves dumbbell down, bicep contracts and tricep contracts

Answer explanation

Movement of hand for exercise is voluntary movement. Due to contraction and relaxation of muscles, movement is possible. When he moves dumbbell up, bicep contracts and tricep relaxes. When he moves dumbbell down, bicep relaxes and tricep contracts.

A scientist is researching on the body structure of rabbit. Which body organ should be selected by scientist to observe the smooth muscle of rabbit under the microscope.

• Diaphragm

• Heart

• Oesophagus

• Any of the above

Answer explanation

We know that muscles that do not move as per our will are called involuntary muscles. The movement of diaphragm, heart and oesophagus is not under our control. Therefore we can say that in diaphragm, heart and oesophagus involuntary muscles are present. Involuntary muscles are also the called smooth muscles. Therefore to observe the smooth muscle under the microscope, the scientist can take the cross of any of the given organ. Hence option 4 is the right answer.

Tags

NGSS.MS-LS1-3