Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

Multiple choice biology life processes: control and coordination structure and function of brain human brain nervous and endocrine system in humans

The control centre of the nervous system (brain) has divisions namely_______

  1. Medulla and thalamus

  2. Forebrain, midbrain and hindbrain

  3. Cerebellum and hindbrain

  4. Forebrain and central brain
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

  • The brain has three divisions, i.e., forebrain, midbrain, and hindbrain. The forebrain consists of the cerebrum, thalamus, and hypothalamus. 
  • The midbrain has decreased in size during vertebrate evolution and the forebrain has gradually acquired much of its function, while the hindbrain consists of medulla, cerebellum and the pons. 

Therefore, the correct answer is option B.

Multiple choice biology life processes: control and coordination structure and function of brain human brain nervous and endocrine system in humans

Which body organ is surrounded by meninges?

  1. Brain and Spinal cord

  2. Brain and Heart

  3. Spinal cord and Lungs

  4. Heart and Lungs
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Three layers of protective tissue that surround the brain and spinal cord are called meninges. These three layers are dura mater, arachnoid mater, and pia mater.

-Dura mater is the outermost layer that separates the cranial cavity into compartments and protects the brain.
-Arachnoid mater is the middle layer of the meninges.
-Pia mater is the innermost layer of the meninges and adheres to the brain.
Thus the correct answer is option A.

Multiple choice biology life processes: control and coordination structure and function of brain human brain nervous and endocrine system in humans

Which part of the human brain aids in visual tracking of moving objects? 

  1. Superior colliculi

  2. Cerebellum

  3. Inferior colliculi

  4. Primary motor area
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

  • Superior colliculi is a part of the midbrain. There are paired structures that are responsible for controlling eye movement. 
  • There are one colliculi in each side of the brain which is responsible for creating a map of the visible area. 
  • The fixation of the vision and the tracking of any object is controlled and regulated by this region of the brain. 
Thus, the correct answer is option A. 

Multiple choice biology life processes: control and coordination structure and function of brain human brain nervous and endocrine system in humans

The outer membrane that covers brain is

  1. Myelin Sheath

  2. Duramater

  3. Arachnoid membrane

  4. Piamater
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The membrane which covers the brain and the spinal cord is called as the meninges. There are three layers of the meninges. The outermost is the Dura mater, middle one is the arachnoid mater and the innermost is the pia mater. Dura mater is the tough membrane which is present in the outermost region. The three meninges provide protection to the brain from shock and injury. 

Thus, the correct answer is option B. 

Multiple choice biology life processes: control and coordination structure and function of brain human brain nervous and endocrine system in humans

White matter consists of

  1. Nerve fibres with myelinated sheath

  2. Nerve fibres without myelinated sheath

  3. Scattered areolar tissue

  4. Nerve fibre with blood vessels
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

White matter is a component of the central nervous system, in the brain and spinal cord. The white matter is placed on the grey matter in the brain while it lies outer to the grey matter in the spinal chord. It consists mostly of glial cells and myelinated axons that transmit signals from one region of the cerebrum to another and between the cerebrum and lower brain centres.

Thus, the correct answer is option A.

Multiple choice biology life processes: control and coordination structure and function of brain human brain nervous and endocrine system in humans

Afferent nerve fibre carries impulses from

  1. Effector to central nervous system

  2. Receptor to central nervous system

  3. Central nervous system to muscles

  4. Central nervous system to receptors
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Afferent (sensory) nerve fibers carry impulses from sensory receptors toward the central nervous system. Efferent (motor) fibers carry impulses away from the CNS to effectors.

Multiple choice biology life processes: control and coordination structure and function of brain human brain nervous and endocrine system in humans

Endorphin is produced by

  1. Pituitary

  2. Hypothalamus

  3. Medulla oblongata

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Endomorphins are the chemical substance which is present in the neurons. It helps in the perception of pain, reactions to stress, and cardiovascular, respiratory and digestive functions. They are produced within the body so they are known as endogenous. They specifically work by binding to opoid receptors which are mainly found in nervous system and regulates the motor neurons which helps to coordinate the physical activity. The hypothalamus activates the pituitary to release ACTH which also stimulates the release of endomophins.
So, the correct answer is option D.
Multiple choice biology life processes: control and coordination structure and function of brain human brain nervous and endocrine system in humans

In Human beings, the cranium is formed by

  1. Eight bones of which two are paired

  2. Fourteen bones of which six are paired

  3. Ten bones of which two are paired

  4. Twelve bones of which four are paired
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The human cranium consists of 8 bones: frontal (1), parietal (2), temporal (2), occipital (1), sphenoid (1), and ethmoid (1). This totals 8 bones with two pairs (parietal and temporal).