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BHSC 1200 Midterm 1 Questions & 100% Correct Answers

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  • BHSC 1200
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  • BHSC 1200

define anatomy and physiology :~~ anatomy: science of body structures and the relationships among them physiology: science of body function describe the structural organization of the human body from simplest to most complex :~~ 1) chemical: atoms and molecules 2) cellular: molecules comb...

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  • September 9, 2024
  • 32
  • 2024/2025
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  • BHSC 1200
  • BHSC 1200
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1 | P a g e | © copyright 2024/2025 | Grade A+




BHSC 1200 Midterm 1 Questions &
100% Correct Answers
define anatomy and physiology

✓ :~~ anatomy: science of body structures and the relationships among them




physiology: science of body function




describe the structural organization of the human body from simplest to most

complex

✓ :~~ 1) chemical: atoms and molecules

2) cellular: molecules combine to form cells

3) tissue: groups of cells and the materials surrounding them that work together to

perform a particular function

4) organ: structures composed of two or more different types of tissues; have

specific functions and recognizable shapes

5) system: related organs with a common function

6) organismal: all parts of the human body functioning together




define homeostasis




Master01 | September, 2024/2025 | Latest update

, 2 | P a g e | © copyright 2024/2025 | Grade A+


✓ :~~ -maintenance of relatively stable conditions in the body's internal

environment

-maintains volume and composition of body fluids




define homeostatic feedback system

✓ :~~ cycle of events in which the status of a body condition is monitored,

evaluated, changed, remonitored, reevaluated, and so on




describe components of homeostatic feedback system


✓ :~~ 1) receptor: body structure that monitors changes in a controlled

condition and sends input to a control centre




2) control centre: sets the set point within which a controlled condition should be

maintained, evaluates the input it receives from receptors, & generates output

commands when they are needed




3) effector: body structure that received output from the control centre and

produces a response or effect that changes the controlled conditions




describe and provide an example of a negative feedback system




Master01 | September, 2024/2025 | Latest update

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✓ :~~ -the response of the effector negates the stimulus; body is brought

back into homeostasis; normal range is achieved; leads to stability




ex/ regulation of blood pressure:

stimulus disrupts homeostasis by increasing controlled condition (blood pressure).

receptor (baroreceptors) send input (nerve impulse) to control centre (brain).

Brain sends output (nerve impulse) to effector (heart and blood vessels) . A

response (lower heart rate and dilate blood vessels) occurs which brings blood

pressure back to normal range




describe and provide an example of a positive feedback system

✓ :~~ -the response of the effector increases/reinforces change of the

stimulus

-body is moved away from homeostasis

-normal range is lost

-used to speed up processes

-leads to instability because output becomes progressively stronger as it is fed

back and reamplified




ex/ contractions during childbirth:

stimulus (contractions of uterine wall forcing baby's head into cervix) increases the

controlled condition (stretching of cervix). receptors (stretch-sensitive nerve cells



Master01 | September, 2024/2025 | Latest update

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in cervix) send input (nerve impulse) to the control centre (brain). Brain sends

output (oxytocin) to effectors (muscles in uterine wall contract) causing a response

(body stretches cervix more). Response increases stimulus until cycle is interrupted

(baby is born)




describe anatomical position

✓ :~~ -standing erect

-head level, eyes forward

-lower limbs are parallel, feet flat on floor and toes facing forward

-upper limbs are at the sides, palms facing forward




superior/inferior

✓ :~~ superior: toward the head or upper part of a structure




inferior: away from the head or lower part of a structure




anterior/posterior

✓ :~~ anterior: nearer to or at the front of the body




posterior: nearer to or at the back of the body




Master01 | September, 2024/2025 | Latest update

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