MDCAT Biology Entry Test MCQs Test No-8 Chapter Wise

MDCAT BIOLOGY ENTRY TEST MCQs

MDCAT Biology entry test mcqs for online preparation. MDCAT Biology chapter wise collection of MCQs.

Entry Test MCQs For Medical 2020

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BIOLOGY ENTRY TEST MCQs

The homeostasis keeps the internal fluctuations in _______ compared to wider external fluctuation.

Constant condition    (c) in a wider range

A narrow range         (d) control condition

Most susceptible components of internal environment that may be affected by fluctuations in external environment are

(a) Hormones, solutes, temperature                   

(c) Enzyme Conc., solutes, temperature

(b) Hormone, PH, temperature                         

(d) Water, solutes, temperature

The mechanism an organism has adapted to eliminate harmful nitrogenous wastes depends upon the availability of

(a)water             
(c) solutes

(b) temperature 
(d) water, solutes, temperature  

The living control systems for the variety of homeostatic regulations work exactly on the mechanism of _______ control system

(a) physical                   (c) biological

(b) physiological           (d) Mechanical

The number of components of living control system for Homeostasis

(a) one                          (c) three

(b) two                         (d) four

A pair of kidney consists of millions of functional units,

(a) Neurons               (c) Glomerulus

(b) Nephrons              (d) Bowman’s capsule

Kidneys recieve _______ of blood supplied with each cardiac beat

(a) 1%                          (c) 15%

(b) 10%                        (d) 20%

Central cavity of the kidney is known as

(a) Pyramid                   (c) Medulla

(b) Pelvis                      (d) Cortex

Bowman’s capsule surround a ball of capillaries called

(a) Pyramid       
(c) Peritubular capillaries

(b) Afferent arteriole 
(d) Glomerulus

Which one of following empties into collecting tubules

(a) Distal tubules           
(c) Peritubular capillaries

(b) Proximal tubules      
(d) loop of Henle

Which one of following helps in balancing pH value of the filterate through tubule

(a) tubular epithelium    
(c) Proximal tubules

(b) Glomerulus walls     
(d) Distal tubules

Mammaliern kidney is adapted to conserve water by over 99.5% reabsorption of

(a) Blood of afferent arteriole    

(c) Glomerular filterate

(b) Blood of efferent arteriole   

(d) Tubular filterate

ADH is released from  

(a) Anterior pituitary lobe         

(c) Adrenal cortex

(b) Posterior pituitary lobe        

(d) Adrenal medulla

Kidney stones are formed in  

(a) Infectious diseases   
(c) Genetic diseases

(b) Deficiency diseases 
(d) Metebolic diseases

The incidence of uric acid type stones are _______% of all the kidney stones

(a) 05%             (c) 15%

(b) 10%             (d) 70%

Lumbar are __________ vertebrae

(a) 5 cervical                 (c) 9 cervical

(b) 5 thoracic                (d) 9 thoracic

The clavicle connects _______ with sternum.

(a) Humerus      
(c) Vertebral column

(b) Mandible     
(d) Scapula

___________ support the fingers

(a) Carpals        
(c) Phalanges

(b) Tarsals        
(d) Radius ulna

___________ joints fix teeth into the jaw.

(a) cartilaginous            (c) synovial

(b) Fibrous                    (d) Hinge

The part of skeletal muscle which contract

(a) Belly                       (c) Insertion

(b) Tendon                   (d) Origin

___________ attach muscles to bones and are __________

(a) Tendons, elastic       
(c) Tendons, non-elastic

(b) Ligaments, elastic    
(d) Ligaments, non-elastic

_________ straightens the arm at the albow joints  

(a) Brachialis                (c) Biceps

(b) Brachioradialus       (d) Triceps

___________ muscle control movement of substances through hollow organs & are ______ in action.

(a) smooth, voluntary              

(c) Skeletal, voluntary

(b) Smooth, involuentary          

(d) Skeletal, involuntary

Which one of following is incorrect about cardiac muscles

(a) Appearance Regular stripes 

(c) Many nuclei per cell

(b) Branched cell shape            

(d) Spontaneous contraction

Muscle fatigue results from relative deficit of

(a) Lactic acid          (c) Calcium

(b) Ions                     (d) ATP  

_________ is most common in thigh & hip muscles, usually occurs at night or after exercise

(a) Tetanus                    
(c) Cramp

(b) Tetany                     
(d) Muscle fatigue

The diameter of myofibril is

(a) 1-2 um             (c) 10-100 um

(b) 10-20 um        (d) 7-8 nm

Sarcomere are the contractile units of

(a) Myofilament 
(c) Myofibril

(b) Myofibre     
(d) Myofibre & Myofibril

Striped appearance of muscle of cell is due to

(a) A band             (c) H-zone  

(b) I band              (d) M-line

According to sliding filament model, which one of followings become shortens during mucle contraction

(a) A band               (c) H-zone

(b) I band                (d) Z-line