Anatomy and Physiology Flashcards
What are the agonist and antagonist in elbow flexion ?
Agonist - Biceps
Antagonist - Triceps
What are the agonist and antagonist in elbow extension ?
Agonist - Triceps
Antagonist - Biceps
What are the agonist and antagonist in ankle plantarflexion ?
Agonist - Gastrocnemius
Antagonist - Tibialis Anterior
What are the agonist and antagonist in ankle dorsiflexion ?
Agonist - Tibialis Anterior
Antagonist - Gastrocnemius
What are the agonist and antagonist in knee flexion ?
Agonist - Hamstrings
Antagonist - Quadriceps
What are the agonist and antagonist in knee extension ?
Agonist - Quadriceps
Antagonist - Hamstrings
What are the agonist and antagonist in hip flexion ?
Agonist - Hip Flexors
Antagonist - Gluteals
What are the agonist and antagonist in hip extension ?
Agonist - Gluteals
Antagonist - Hip Flexors
What are the agonist and antagonist in hip adduction ?
Agonist - Adductors
Antagonist - TFL
What are the agonist and antagonist in hip abduction ?
Agonist - TFL
Antagonist - Adductors
What are the agonist and antagonist in hip horizontal adduction ?
Agonist - Adductors
Antagonist - TFL
What are the agonist and antagonist in hip horizontal abduction ?
Agonist - TFL
Antagonist - Adductors
What are the agonist and antagonist in shoulder flexion ?
Agonist - Anterior Deltoid
Antagonist - Latissimus Dorsi
What are the agonist and antagonist in shoulder extension ?
Agonist - Latissimus Dorsi
Antagonist - Anterior Deltoid
What are the agonist and antagonist in shoulder adduction ?
Agonist - Posterior Deltoid
Antagonist - Middle Deltoid
What are the agonist and antagonist in shoulder abduction ?
Agonist - Middle Deltoid
Antagonist - Posterior Deltoid
What are the agonist and antagonist in shoulder horizontal adduction ?
Agonist - Pectorals
Antagonist - Latissimus Dorsi
What are the agonist and antagonist in shoulder horizontal abduction ?
Agonist - Latissimus Dorsi
Antagonist - Pectorals
What is an isometric muscle contraction ?
When the muscle contracts but stays the same length
Isotonic muscles contractions have what ?
Movement
What is an isotonic concentric muscle contraction ?
When the agonist muscle contacts and gets shorter
What is an isotonic eccentric muscle contraction ?
When the agonist muscle contracts and gets longer
Flexion and Extension are in what Plane and Axis ?
Sagittal Plane + Transverse Axis
Adduction and Abduction are in what Plane and Axis ?
Frontal Plane + Sagittal Axis
Horizontal Adduction and Abduction are in what Plane and Axis ?
Transverse Plane + Longitudinal Axis
What does the Sino Atrial node cause ?
Atrial Systole
The Atrial Ventricular node picks up what ?
Electrical impulses
Where do the electrical impulses trave to next ?
The bundle of His, and down the left and right branches
What causes ventricular systole ?
Purkinje Fibres
What are sensory receptors ?
Chemoreceptors - increased CO2 + acidity
Proprioceptors - movement
Baroreceptors - change in blood pressure
Where in the brain do these receptors send info to, when controlling the heart ?
Medulla Oblongata - Cardiac Control Centre
What system and nerve increases heart rate ?
Sympathetic system + Accelerator nerve
What system and nerve helps decreases heart rate ?
Parasympathetic system + Vegas nerve
What hormones also affect heart rate ?
Increase - Adrenaline
Decrease - Acetylcholine
Where is the blood flow to the muscles and organs controlled ?
Arterioles + Pre-capillary sphincters
What happens to the blood flow at the organs during vasoconstrictions ?
Increased stimulation of the sympathetic nerve, causes vasoconstriction to decrease the blood flow to the capillaries of the non-essential organs
What happens to the blood flow at the muscles during vasodilation ?
Decreased stimulation of the sympathetic nerve, causes vasodilation of arterioles + sphincters, to increase the blood flow to the capillaries of the working muscles
What is the first method of the Venous Return Mechanism ?
One way valves in veins
What is the second method of the Venous Return Mechanism ?
Skeletal muscle pump
What is the third method of the Venous Return Mechanism ?
Respiratory pump
What is the fourth method of the Venous Return Mechanism ?
Suction pressure of the heart
What is the first step of Starlings Law ?
Increased venous return
What is the second step of Starlings Law ?
Greater diastolic filling
What is the third step of Starlings Law ?
Cardiac muscles stretch
What is the fourth step of Starlings Law ?
Greater force of muscle contraction
What is the fifth step of Starlings Law ?
Increased ejection fraction
What is the first method of Cardio Vascular Drift ?
Increased heart rate due to a decrease in stroke volume
What is the second + third methods of Cardio Vascular Drift ?
Occurs in warm environments after 10 minutes
What is the fourth method of Cardio Vascular Drift ?
Caused by a reduction of fluid in the blood volume
What is the fifth method of Cardio Vascular Drift ?
Venous return decreases
What is the sixth method of Cardio Vascular Drift ?
Aims to cool the body down by maintaining cardiac output
Where in the brain do the receptors send info to, when controlling breathing ?
Medulla Oblongata - Respiratory Control Centre
How do you increase breathing rate ?
Sympathetic system + Phrenic nerve
How do you decrease breathing rate ?
Parasympathetic system
What hormones also affect breathing rate ?
Increase - Adrenaline
Decrease - Acetylchloride
How does the alveoli having a vast surface area help to assist diffusion ?
Allows more places for diffusion to take place
How does thin alveoli walls help to assist diffusion ?
One cell thick allows for a short diffusion pathway
How does the moist lining of alveoli help to assist diffusion ?
Water helps to dissolve and diffuse oxygen
How does a large capillary network to the alveoli help to assist diffusion ?
Lots of blood vessels for gaseous exchange
How does a short diffusion path help to assist diffusion ?
Thin membranes for gases to diffuse through
What respiratory illnesses can smoking cause ?
Bronchitis, Cancer
How does smoking prevent efficient diffusion, and causes emphysema?
Damages the alveoli so tar can now collect in the alveoli, can also create holes in the alveoli
How does smoking effect the respiratory systems supply of oxygen to the muscles ?
Decreased efficiency
How does smoking effect the filtering of air particles ?
Damages cilia so tar can collect on tiny hairs that are responsible for filtering air particles, so it can’t happen efficiently
What is arterio-venous difference ?
The difference between the oxygen content of the arterial blood arriving at the muscles and the venous blood leaving the muscles
What happens to the A-VO2 difference at rest ?
It is low - not much oxygen is required by the muscles
What happens to the A-VO2 difference during exercise ?
It is high - lots of oxygen is required by the muscles